from itertools import combinations
n = int(input())
xy = [list(map(int, input().split())) for i in range(n)]
ans = 0
for c in combinations(xy, 2):
    a, b = c
    x1, y1 = a
    x2, y2 = b
    cnt = 0
    for x, y in xy:
        if (x1 - x) * (y1 - y2) == (x1 - x2) * (y1 - y):
            cnt += 1
    ans = max(ans, cnt)
print(ans)